Enantioselective Synthesis of 1-Aryl-Substituted Tetrahydroisoquinolines Through Ru-Catalyzed Asymmetric Transfer Hydrogenation
作者:Marc Perez、Zi Wu、Michelangelo Scalone、Tahar Ayad、Virginie Ratovelomanana-Vidal
DOI:10.1002/ejoc.201500951
日期:2015.9
A convenient and general asymmetric transfer hydrogenation of a wide array of 1-aryl-3,4-dihydroisoquinoline derivatives using a [RuIICl(η6-benzene)TsDPEN] complex in combination with a 5:2 HCOOH–Et3N azeotropic mixture as a hydrogen source was developed. Under mild reaction conditions, the described catalytic transformation secured a practical synthetic access to the corresponding valuable chiral
使用 [RuIICl(η6-苯)TsDPEN] 配合物与 5:2 HCOOH-Et3N 共沸混合物作为氢源,方便且通用地对各种 1-芳基-3,4-二氢异喹啉衍生物进行不对称转移氢化已开发。在温和的反应条件下,所描述的催化转化确保了获得相应有价值的手性 1-芳基四氢异喹啉单元的实际合成途径,该单元具有高原子经济性、广泛的底物范围、高分离产率(高达 97%)和良好的对映选择性(高达99% ee)。发现反应的立体化学结果受催化剂结构和底物上存在的取代基的强烈影响。